Error:
Problem has occured and has been reported! We'll fix it soon!
Minor nitpick of your error page: occurred, not occured.
fixed, thank you, I'm embarrassed
Overall the site looks good (I've bookmarked it for possible personal use). That said, your use of the word "term" when actually planning a meeting (i.e. "choose possible terms for meeting") threw me a bit. You may be better served just switching "term" to "time" in most instances.
thank you!
I've been thinking about switching from "term" to "time", I think I'll do it tomorrow.
(p.s. I've checked my server logs, I didn't expect users to have IPv6 addresses :))